COMPARISON9 min read·April 27, 2026

MyProtocolStack vs Function Health: Lab Subscription vs Tracking Platform

Function Health gives you unlimited labs for $499/yr. MyProtocolStack tracks any labs alongside peptides. They actually pair well — here's how.

Quick Take Function Health is the best lab subscription on the market right now: $499/yr for two comprehensive panels (110+ markers each) and unlimited follow-up testing. They are not a tracking platform — they're a lab service. MyProtocolStack is the tracking platform you want sitting on top of your Function Health draws (or any lab service). These two products solve different problems and actually pair well together. We're not direct competitors so much as complementary tools.

What Function Health Does Well

Function Health, founded in 2023, did something nobody else managed: they made comprehensive lab testing affordable on a subscription basis. For $499/yr you get:

•**Two full panels per year** (each ~110+ markers including hormones, metabolic, cardiovascular, micronutrients, inflammation, kidney, liver, hematology, thyroid)

•**Unlimited follow-up testing** within the year (they pay for the labs)

•**Mark Hyman branded interpretations** in the app — explanatory text per marker, plain-English context

•**AI-assisted summaries** that flag areas worth investigating

•**Provider review** — a clinician signs off on your panel and can answer some questions

This is genuinely transformative for anyone who used to pay $500-$2,000 per panel through traditional channels. Function broke the pricing model.

Where Function Health Stops Short

Function is a lab service with an app. It is not a multi-source tracker, not a protocol management system, and not a peptide platform.

•**Function-only ecosystem** — you can't upload your old LabCorp results into Function. The trend lines start the day you join.

•**No peptide dose logging** — Function knows nothing about your tirzepatide injections or BPC-157 schedule

•**No macro tracking**

•**No vial inventory or reconstitution calculator**

•**No cycle planning**

•**No StackAI-style protocol-aware analysis** — their interpretations are general (e.g., "high ApoB is associated with cardiovascular risk"), not "your ApoB rose because you started X compound 8 weeks ago"

If your tracking needs end at "I want comprehensive labs and a basic interpretation," Function is enough. If you're running protocols and tracking the relationship between compounds, doses, and biomarker movements, Function doesn't go that deep.

How MyProtocolStack Pairs With Function

This is the actual answer for most users: use both. Function gives you the labs at the best price in the market. MyProtocolStack gives you the multi-source tracking, the peptide layer, and the AI panel analysis.

The workflow:

1. Function runs your panel (twice a year, plus follow-ups as needed)

2. You download the PDF from Function

3. You upload to MyProtocolStack — biomarkers extracted automatically

4. You can also upload your historical Quest/LabCorp/clinic results, so your trend doesn't reset

5. StackAI reads the panel in context of the peptides or protocols you're running

6. Dose logs, vial inventory, macros, body data — all alongside the lab data

This stack runs about $680/yr ($499 Function + $180 MyProtocolStack annual at $90 + $90) and gives you more than InsideTracker's ~$1,240/yr quarterly cadence with significantly more peptide/protocol functionality.

Feature Comparison

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Pricing

Function Health is $499/yr — flat-rate, all panels included. The price has held since launch and is generally considered the best lab-subscription value in the market.

MyProtocolStack is $14.99/mo or $90/yr (50% off annual). The free Explorer tier covers manual lab entry, the peptide library, and the reconstitution calculator. Optimizer unlocks StackAI, dose logging, macros, and the rest.

The combined stack ($499 Function + $90 MyProtocolStack annual) is roughly the same total cost as Function alone — and you get the entire peptide/protocol layer added on top.

When Function Alone Is Enough

•You only care about the labs and a baseline interpretation

•You don't run peptides or protocols

•You're new to longevity testing and don't have multi-year historical data

•You trust the Function ecosystem to be your single source of truth

When You Want MyProtocolStack On Top

•You run peptide, GLP-1, TRT, or hormone protocols

•You want StackAI's protocol-aware analysis ("your IGF-1 is up because of the tesamorelin")

•You have lab data from before you joined Function (Quest, LabCorp, clinic, etc.)

•You want one dashboard for labs + doses + macros + body data

•You're titrating a GLP-1 and want to see the metabolic markers move with the dose schedule

The Honest Verdict

Function Health and MyProtocolStack are complementary, not competitive. Function is the best lab subscription. MyProtocolStack is the best tracking platform for protocol users. Together they cost about $590/yr and cover labs (Function), the tracking and analysis layer (MyProtocolStack), and the peptide-specific tooling (MyProtocolStack).

The question isn't "Function vs MyProtocolStack" — it's "do I want labs, or do I want labs + peptide tracking + macros + AI analysis?" If the latter, the stack is the answer.

If you're choosing only one: Function gets you the most labs for the lowest price, and that's probably the right starting point. MyProtocolStack adds the most value when you have an active protocol to track alongside the labs.

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*This article is for informational and educational purposes only. MyProtocolStack and Function Health are tracking and education platforms. Neither product diagnoses, treats, or prevents disease. Function Health partners with licensed clinicians for clinical review; MyProtocolStack is an educational tracking platform and does not provide clinical decision support. Consult a qualified healthcare provider before making changes to any nutrition, peptide, or pharmaceutical protocol.*

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